Controls and Operating
3-46
'Reverse Light' illuminates to warn personnel to the rear of the machine
that reverse gear has been selected.
During reversing operations it is recommended to reduce the engine
speed. Use only 1st or 2nd gear and never exceed 10 km/h (6.2 mile/h).
The electronic control system distinguishes between the throttle position
(or load ranges) depending on the governor position (injection pump). On
a light throttle opening, the transmission will give earlier upshifts and later
downshifts than when operating at full throttle.
A kickdown facility, which can be used when automatic mode is selected,
allows for the possibility of selecting a lower gear by pressing down fully
on the throttle pedal and holding. This can be used to provide a downshift
on demand provided that the vehicle speed is within the range allowable.
That is, the vehicle is not travelling at a speed that would result in the
engine overspeeding in the lower gear. When driving with kickdown, the
transmission will give earlier downshifts and later upshifts. To disengage
the transmission kickdown, release the throttle pedal and allow it to return
to a light throttle position.
When operating in automatic range with the display indicating that the
transmission has downshifted to 2nd gear, there are two options for pro-
viding a further downshift as conditions indicate.
1. 1st gear can be manually selected by pushing the shift lever to the left.
2. Kickdown can be selected from 2nd automatic, when the transmission
will downshift to 1st gear, depending upon the vehicle speed.
When the kickdown is released, the transmission will upshift to 2nd auto-
matic, provided that the forward speed has increased sufficiently to allow
this to happen, and that the shift lever is in the automatic mode.
A DISPLAY screen is provided which indicates gear selected and driving
direction as follows:
Manual Mode - When driving with shift selector in manual range, the bars
only are shown in position 1, and, driving direction and gear selected are
indicated in positions 2 and 3.
Automatic Mode - When driving with shift selector in automatic range, a
full display of bars and arrows are shown in position 1, and, driving direc-
tion and gear selected are indicated in positions 2 and 3.
Under certain conditions, the transmission may start to 'hunt' between
gears when in automatic mode. The transmission changes up and down
between two gears at short intervals because there is not sufficient power
to sustain driving in the higher gear, but is sufficient for upshifting from the
lower gear. By using the shift display, it can be established which gears
are involved and in these circumstances the lower gear should be
selected using the shift control lever. Automatic mode should be rese-
lected at the earliest opportunity.
During machine operation, watch for wide deviations from normal read-
ings on the transmission oil temperature gauge. If the gauge shows the oil
temperature rising above 120 °C during normal operation, or above 145
To Next Page
